Rather than screen all immigrants for TB, developed countries could be more focused

While Canada screens all immigrants for tuberculosis, the vast majority of active cases of the disease are found in people arriving from a handful of countries where TB is prevalent, new research suggests. The findings are relevant to other developed countries with large numbers of immigrants, such as the United States, Australia and some Western European countries, which have TB screening processes similar to Canada's, so rather than screen all immigrants for TB, developed countries should be more focused